Paper-cutting knife



P 1952 J. w. JOSEPH 2,608,757

PAPER-CUTTING KNIFE Filed NOV. 10, 1948 ATTORNEY Patented Sept. 2, L952 I Yarn Ni Yqfiacorpo'raItion df New York appreaianuaveata 10, 1st8, seriallife.552st;

- -s w iz r s invention" relates" to a evice "fir? ciittr g. sheet 'material and more particularly'it'ofa" ,zidi tool forlseverin'g paper, clothor similar sheet v V V I W W material; I r j milled therein whereby arlec ta 'flhejobje'ct of the?" ention is" GdiilbViH a shaped slot 21 is provi ded in the lower ja sim" ified manual cutter'j joif trimm r; which liolflnally'receiveashiall arcu ate s 'g seversorslits'slieet materi'a by a errsrwara; cutting bladej lll Two urfaces; sl'idi'ng'mo'tion'of'the cutt device. Y on-th elower ja'w li are nojrma t I ae e t fi i fit h heiknu roiiersi men tw f izi g present invention; a manually operable cutting terialis inse'rtedtherebetween deviceis provided having a handle with slower severed sheet of mat jawmemter'and an upper spring-pressed jaw between the friction surfaced r 1 member hingedly mounted thereon. The upper and hesurf'aces 2 l a=nd 3 q, the

aw.m e a l'niu tfii h i M s a d ubwsffife i tihi cutting blade secured between-twq knurled-metal 15, movement of the frictiohjroll siover or rubber cylindrical friction rollers; The'two material 3l causesj-tl ie roller a I rollers in contact with' the'" relatively moving sheet of material drive the blade to perform the cuttirig' or slitting operatiofifas the sheetfmatehas.

w other fe'atiiresai'id'advafitagesbfithe iiivention will'be'comeapp'arnt'froiri'thfollowing detailed Y d description taken in conjunction with the acedgelo a; companying drawings in which: sheet of material to be severed. The sheet Fig. 1 is a front elevation of a cutting device material is guided by the beveled surfaces 32 and embodying the features of this invention; 33 to a position between the jaws II and [3. As Fig. 2 is a top plan view of the device shown the sheet material is forced under the friction in Fig. 1; surfaced rollers mounted in the upper jaw, the Fig. 3 is an end view of this device as viewed rollers, being under compression from the leaf from the right end of Fig. 1; spring, will frictionally engage the sheet mate- Fig. 4 is a fragmentary sectional view taken rial thus causing the rollers to be rotated as the along line 4-4 of Fig. l; and cutting device is moved forward. The rollers,

Fig. 5 is a perspective view of a slot-forming being smaller in diameter than the cutting blade, insert shown in Figs. 1 and 4 for receiving the 35 cause the periphery of the cutting blade to travel lower portion of the cutting disc or blade. at a greater rate of speed than the rollers and Referring now to the drawings, the cutting dethus actually to cut or slit the sheet material. vice consists of a lower jaw ll having an integral Manifestly, the handle [2 could be held in a offset handle portion l2. A movable upper jaw stationary fixture, anda sheet of material moved I3 is bifurcated at the left end (Fig. 1) which through the jaws l I, I3 to cut or sever the matefits over the lower jaw H and is pivotally secured rial. thereto by a pin M. The upper jaw l3 normally It is to be understood that the above-described extends in parallel spaced relation with the right arrangements are merely illustrative of the aphand portion of the lower jaw H. A steel leaf plication of the principles of the invention and spring I5 is secured to an inclined portion of the that numerous other arrangements and applilower jaw II by two machine screws it which cations may be devised by those skilled in the pass through an intermediate spacer block ll. art which will embody the principles of the in- The steel leaf spring I5 serves to normally urge vention and will fall within the scope and spirit the jaw l3 toward the jaw II. A vertical aperthereof. ture [8 formed in the jaw l3 has rotatably What is claimed is: mounted therein a disc-shaped cutting blade l9 1. A cutting device comprising a springand two rubber or knurled cylindrical metal fricpressed hinged member and a fixed member, tion rollers 20 and 2| on a shaft 22. The rollers said hinged member having mounted therein 20, 2| and the intermediate cutting blade H) are for rotary movement a disc-shaped cutting blade rigidly secured together by two pins 23 to form and two cylindrical friction members, one of one composite rotatable unit. said cylindrical members being secured to each l .l 3 side of the cutting blade, said cylindrical members normally being pressed by the spring against sheet receiving surfaces on the fixed member, said fixed member having a recess therein, a slotted insert secured within the recess for receiving a small segment of the cutting blade within the, slot,said cylindrical members driving the cutting blade as sheet material is moved between the cylindrical members and the sheet receiving surfaces of said fixed member.

2. A cutting device comprising a fixed lower jaw member having an extended portion, a movable upper jaw member hingedly mounted on said lower jaw member, resilient means carried by the extended portion of said lower jaw member for urging the two jaw members together, said lower jaw member having a blade receivingslot therein, a rotary cutting blade carried by said upper jaw member, and a knurled cylindrical roller secured on each side of said blade. said rollers being forced by said resilient means to normally bear'agains't the surfaces adjacent the sidesof the blade-receiving, slot on the lower jawmember; y J

--3.= 'A cutting device comprising upper and lower'jaw members having inwardly tapered portions to provide a guiding mouth for sheet material, said upper jaw member being hingedly mounted on the lower 'jaw member, resilient means secured to'the lower jaw member for normally urging the upper jaw member toward the lowerjaw member, said'lower jaw having a blade-receiving slot therein a rotary cutting blade carried by the upper jaw member, and a cylindrical friction roller secured on, each side of the blade, saidrollers being forced by said resilient means to normally bear against the surfaces adjacentthe sides of the blade receiving slot on the lowerjaw membensaid blade being rotated by manually moving a sheet of material through the guiding mouth into contact with the rollers to transmit movement of the material to the rollers so that the bladeis rotated to cut the material 4. In a hand tool for slitting sheet material, a

- handle having a first jaw formed integral therethecutting member to sever the sheet.

5. A cutting device for sheet material comprising a lower jawmember having a recess therein and an extended portion, an upper jaw member hingedly mounted on the lower jaw member, each of said jaw members having inwardly tapered portions to provide a guiding mouth for the sheet material, a disc-shaped blade rotatably mounted in the upper jaw member, a slotted insert positioned within said recess in the lower jaw member to receive a small segment of the blade, and a resilient leaf spring secured to the extended portion of the lower jaw membergand pressing on the upper jaw membe r to urge the upper jaw member vtoward the lower jaw" member so that the blade will rotate to out the sheet material as it passes between the jaw members.

REFERENCES CITED,

The following references are of record in the file of this patent: v

UNITED STATES PATENTS Number Name Date; 1,189,168 Parsons June 27, 19.l 6 1,795,394 Hirsch Mar. 10, 1931 1,821,! 16 Kusiv Sept. 1, 1931 2,466,179

JAY w. JOSEPH,

Milan Apr. 5, 1949 

